testing
-- Ove.lampe ( talk) 20:01, 23 April 2008 (UTC)
− b ± b 2 − 4 a c 2 a {\displaystyle -b\pm {\sqrt {b^{2}-4ac}} \over 2a}
f ( t ) = sin ( i / 50 ) + 0.5 × sin ( i / 10 ) + 0.1 × sin ( i ) {\displaystyle f(t)=\sin(i/50)+0.5\times \sin(i/10)+0.1\times \sin(i)}
N ( μ , σ 2 ) {\displaystyle N(\mu ,\sigma ^{2})}
N ( x ) = 1 2 π ∗ e − x 2 / 2 {\displaystyle N(x)={\frac {1}{\sqrt {2\pi }}}*e^{-\mathbf {x} ^{2}/2}}
1 4 π erf 2 ( x ) {\displaystyle {\frac {1}{4}}{\sqrt {\pi }}\operatorname {erf} ^{2}\left(x\right)}
e − ( x − 2.5 ) 2 2 + e − ( x + 2.5 ) 2 2 + 1 40 e − 200 ( 2.5 + x ) 2 + 1 40 e − 200 ( − 2.5 + x ) 2 {\displaystyle e^{-{\frac {{(x-2.5)}^{2}}{2}}}+e^{-{\frac {{(x+2.5)}^{2}}{2}}}+{\frac {1}{40}}e^{-200(2.5+x)^{2}}+{\frac {1}{40}}e^{-200(-2.5+x)^{2}}}
